Phase detector circuit and method therefor

Details Phase detector circuit and method therefor Phase detector circuit and method therefor

2007-01-30

2008-12-02

Cox, Cassandra (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S007000

Reexamination Certificate

active

07459949

ABSTRACT:
The disclosure relates to phase detectors. Charge up and charge down signals that are generated by a phase detector cause i) following detection of a first edge of a reference clock signal, switching on of a switching transistor of sink current; ii) following detection of an edge of a feedback clock signal falling within less than 180 degrees from the first edge, switching on of a switching transistor of source current and switching off of the switching transistor of sink current; and iii) following detection of an edge of another reference signal at a point in time about midway between the first edge and a next similar edge of the reference clock signal has past, switching off of the switching transistor of source current while maintaining the switching transistor of sink current switched off.

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